Centrifuge



FIG. 1 is a perspective view of a centrifuge showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is an enlarged view of the display panel of FIGS. 1, 3 and 4. 

The ornamental design for a centrifuge, as shown and described. 